20009942085792 has 192 divisors, whose sum is σ = 53634024702720. Its totient is φ = 6530344550400.

The previous prime is 20009942085769. The next prime is 20009942085829. The reversal of 20009942085792 is 29758024990002.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2170035742 + ... + 2170044962.

It is an arithmetic number, because the mean of its divisors is an integer number (279343878660).

Almost surely, 2^{20009942085792} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20009942085792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26817012351360).

20009942085792 is an abundant number, since it is smaller than the sum of its proper divisors (33624082616928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20009942085792 is a wasteful number, since it uses less digits than its factorization.

20009942085792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10967 (or 10959 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 57.

The spelling of 20009942085792 in words is "twenty trillion, nine billion, nine hundred forty-two million, eighty-five thousand, seven hundred ninety-two".